We have taken the results of the telemetry test of gasoline vehicles in Nanjing as an example, to analyze the single telemetry test data of the gasoline vehicles and the annual inspection data. It found that there is no correlation between the 2 sets of data. This may be caused by differences in vehicle speed and other detection environments. The changes of overall telemetry value will not present a trend with the increase or decrease of annual check value, the single telemetry data of vehicles is not representative, it cannot be the basis for determining whether the vehicle exceeds the standard. In the analysis of the unsatisfactory number of telemetry gasoline vehicles, the setting of emission limits, and the time interval of the telemetry annual inspection, we found that when the unqualified number of a telemetry gasoline vehicle reaches 5 times or more, or the unqualified number of the telemetry vehicle reaches 3 times, at the same time, this 3 times happened within 60 days between the telemetry and the annual inspection(telemetry is before of the annual inspection), then in this unqualified vehicles, more than 80% of those vehicles’ annual results are also unqualified, the test results of telemetry and annual inspection are more consistent. Although the detection methods and emission standards of the 2 methods are different, they can effectively filter out the excessive emission vehicles, and the telemetry method is more rapid, and do not need to stop detection, which does not affect the driving of vehicles.